👉 The term "Pachyviridae" refers to a family of viruses that belong to the class Retroviruses, which are also known as Adenoviruses or Retroviruses. These viruses primarily infect the human and animal respiratory systems, causing infections such as colds, flu, pneumonia, and bronchitis. The family includes viruses like the common cold virus (Rhinovirus) and the adenovirus (Adenovirus).